Add support for file path in Inline Config Parser

[shashwatj07]

This deals with Inline Config for 3 special cases:

1. checkstyle/src/test/java/com/puppycrawl/tools/checkstyle/checks/imports/ImportControlCheckTest.java

   Lines 67 to 68 in 710dc77

   	final DefaultConfiguration checkConfig = createModuleConfig(ImportControlCheck.class);
   	checkConfig.addProperty("file", getPath("InputImportControlOne.xml"));

   
   For Inline Config, this will be dealt with:

file = (file)ABCD.xml

This resolves to the absolute system path to the resource which is different for Linux and Windows.
Example:

C:\checkstyle\src\test\resources\com\puppycrawl\tools\checkstyle\checks\imports\importcontrol\ABCD.xml

2. checkstyle/src/test/java/com/puppycrawl/tools/checkstyle/checks/imports/ImportControlCheckTest.java

   Lines 286 to 287 in 710dc77

   	final DefaultConfiguration checkConfig = createModuleConfig(ImportControlCheck.class);
   	checkConfig.addProperty("file", getResourcePath("InputImportControlOne.xml"));

   
   For Inline Config, this will be dealt with:

file = (file)(resource)ABCD.xml

This resolves to the relative Linux style path from package root.
Example:

/com/puppycrawl/tools/checkstyle/checks/imports/importcontrol/ABCD.xml

3. checkstyle/src/test/java/com/puppycrawl/tools/checkstyle/checks/imports/ImportControlCheckTest.java

   Lines 314 to 315 in 710dc77

   	final DefaultConfiguration checkConfig = createModuleConfig(ImportControlCheck.class);
   	checkConfig.addProperty("file", getUriString("InputImportControlOne.xml"));

   
   For Inline Config, this will be dealt with:

file = (file)(uri)ABCD.xml

This resolves to the URI String according to
Example:

file:/C:/checkstyle/src/test/resources/com/puppycrawl/tools/checkstyle/checks/imports/importcontrol/ABCD.xml